Trait HookPollNextUpdate

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pub trait HookPollNextUpdate {
    // Required method
    fn poll_next_update(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
    ) -> Poll<bool>;
}
Expand description

Defines reactivity of a hook.

See poll_next_update() for details.

Required Methods§

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fn poll_next_update(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<bool>

The meaning of the return value is:

  • Poll::Pending means this hook’s inner state is not updated after the last use_hook. The executor DO NOT NEED to call use_hook again because the returned value is expected to remain the same as the value from the last call. The executor CAN still call use_hook to re-get the returned value.

  • Poll::Ready(true) means this hook’s inner state has been updated since the last use_hook. The executor SHOULD call use_hook again to get the new value. If the executor doesn’t update or use this hook, instead, it polls the hook again, the hook may still return Poll::Ready(true).

  • Poll::Ready(false) means this hook’s inner state will never be updated. The executor CAN drop this hook. The executor CAN call use_hook to get the value or update it, and the hook MIGHT become dynamic again during use_hook or update_hook, or when some operations is done to the returned value.

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impl<H> HookPollNextUpdate for &mut H

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fn poll_next_update(self: Pin<&mut &mut H>, cx: &mut Context<'_>) -> Poll<bool>

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impl<H> HookPollNextUpdate for Box<H>

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fn poll_next_update(self: Pin<&mut Box<H>>, cx: &mut Context<'_>) -> Poll<bool>

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impl<P> HookPollNextUpdate for Pin<P>

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fn poll_next_update(self: Pin<&mut Pin<P>>, cx: &mut Context<'_>) -> Poll<bool>

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impl HookPollNextUpdate for HookTuple<()>

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impl<Data, Dep> HookPollNextUpdate for Memo<Data, Dep>

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impl<Dep, E: EffectFor<Dep>> HookPollNextUpdate for Effect<Dep, E>

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impl<E: EffectForNoneDependency> HookPollNextUpdate for EffectOnNextPoll<E>

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impl<E: EffectForNoneDependency> HookPollNextUpdate for EffectOnce<E>

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impl<H: HookPollNextUpdate + HookUnmount + Default> HookPollNextUpdate for UninitializedHook<H>

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impl<H: HookPollNextUpdate + HookUnmount> HookPollNextUpdate for LazyPinnedHook<H>

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impl<H: HookPollNextUpdate + Unpin> HookPollNextUpdate for SignalEq<H>

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impl<InnerHook, U> HookPollNextUpdate for FnHookUninitialized<InnerHook, U>

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impl<InnerHook, U, I> HookPollNextUpdate for FnHook<InnerHook, U, I>
where I: Initialized, InnerHook: Default + HookPollNextUpdate + HookUnmount, U: for<'hook> FnMutOneArg<Pin<&'hook mut InnerHook>>,

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impl<P: FnMut(&mut Context<'_>) -> Poll<bool>> HookPollNextUpdate for PollNextUpdate<P>

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impl<S: 'static + Signal> HookPollNextUpdate for LocalKeySignalHook<S>

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impl<S: 'static + Signal> HookPollNextUpdate for LocalKeySignalHookUninitialized<S>

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impl<T0> HookPollNextUpdate for HookTuple<(T0,)>

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impl<T1, T0> HookPollNextUpdate for HookTuple<(T1, T0)>

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impl<T2, T1, T0> HookPollNextUpdate for HookTuple<(T2, T1, T0)>

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impl<T3, T2, T1, T0> HookPollNextUpdate for HookTuple<(T3, T2, T1, T0)>

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impl<T4, T3, T2, T1, T0> HookPollNextUpdate for HookTuple<(T4, T3, T2, T1, T0)>

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impl<T5, T4, T3, T2, T1, T0> HookPollNextUpdate for HookTuple<(T5, T4, T3, T2, T1, T0)>

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impl<T6, T5, T4, T3, T2, T1, T0> HookPollNextUpdate for HookTuple<(T6, T5, T4, T3, T2, T1, T0)>

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impl<T7, T6, T5, T4, T3, T2, T1, T0> HookPollNextUpdate for HookTuple<(T7, T6, T5, T4, T3, T2, T1, T0)>

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impl<T8, T7, T6, T5, T4, T3, T2, T1, T0> HookPollNextUpdate for HookTuple<(T8, T7, T6, T5, T4, T3, T2, T1, T0)>

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impl<T9, T8, T7, T6, T5, T4, T3, T2, T1, T0> HookPollNextUpdate for HookTuple<(T9, T8, T7, T6, T5, T4, T3, T2, T1, T0)>

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impl<T> HookPollNextUpdate for Mut<T>

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impl<T> HookPollNextUpdate for LazyPinned<T>

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impl<T> HookPollNextUpdate for Pinned<T>

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impl<T> HookPollNextUpdate for GenSignalHook<T>

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impl<T> HookPollNextUpdate for SharedRef<T>

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impl<T> HookPollNextUpdate for SharedRefUninitialized<T>

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impl<T> HookPollNextUpdate for SharedSignal<T>

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impl<T, U: StateUpdater<T>> HookPollNextUpdate for StateWithUpdater<T, U>

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impl<T: 'static> HookPollNextUpdate for GenRefOwner<T>